Adobe Premiere Elements 12 - Manual (Page 311)

Glossary
3GP
16:9
AC3
ADC (Analog-to-Digital Converter)
AGP slot
aliasing
alpha channel
analog video
anti-aliasing
artifact
aspect ratio
audio lead
audio sample rate
AVI
AV-to-DV converter
bit depth
bitmap
Blu-ray
Third generation platform. A file format for video recorded by mobile phones.
The aspect ratio of widescreen TV.
See Dolby Digital.
The hardware that converts an analog audio or video signal into a digital signal that you can process with a
computer.
Accelerated graphics port slot. A connector on a computer’s motherboard for use with a GPU card. See GPU.
Undesirable jagged or stair-stepped appearance of angled lines in an image, graphic, or text.
Stores a matte (also known as a mask), which defines transparent areas of a computer graphic or clip. Color information is stored
in the three color channels, red, green, and blue (RGB). See also channel.
Video that consists of a continuous electrical signal. Most TVs and VCRs are analog video devices. To be stored and manipulated
on a computer, analog video must be converted to digital video.
The smoothing of edges in an image, graphic, or text. Anti-aliased edges appear blurred up close but smooth at normal viewing
distance. Anti-aliasing is important when working with high-quality graphics for broadcast.
Distortion in a picture or a sound signal. With digital video, artifacts can result from overloading the input device with too much signal or
from excessive or improper compression.
The ratio of an image’s width to its height. For example, a standard video display has an aspect ratio of 4:3. Most motion pictures
use the more elongated aspect ratio of 16:9. See also widescreen.
See J-cut.
The number of samples taken per second to reproduce audio digitally. The higher the sample rate, the higher the quality of
the digital audio. A rate of 44,100 samples per second produces CD-quality audio and captures the range of human hearing.
Audio Video Interleave. The standard, uncompressed video file format on the Microsoft® Windows® platform.
An electronic device that converts analog video signals to digital video signals. Compare to DV-to-AV converter.
In digital graphics and video, bit depth indicates the number of colors an image can display. A high-contrast (no gray tones) black and
white image is 1bit, meaning it can be off or on, black or white. As bit depth increases, more colors become available. 24-bit color allows for
millions of colors to be displayed.
Similarly, in digital audio, bit depth indicates the number of bits per sample. The higher the number, the better the sound quality.
A graphic image comprised of individual pixels, each of which has values that define its brightness and color.
An optical disc format that has five times the storage capacity of DVDs. It can store 25GB on a single-layer disc or 50GB on a dual-layer
disc. It gets its name from the blue-violet laser it uses (as opposed to the red laser used by other optical discs).
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